X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fserver%2Fgdb_server.c;h=8fb3b64f954f1c539516f14cc7024e6585f6600e;hp=ef45c772adc2cf14029678516f4668ed0091c315;hb=8d73c2a9b0c00c870694a57f7cfbc23e354855ac;hpb=dfe1b3f31478817951ee8c493d5eec605b43cc6a diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c index ef45c772ad..8fb3b64f95 100644 --- a/src/server/gdb_server.c +++ b/src/server/gdb_server.c @@ -2,6 +2,9 @@ * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * + * Copyright (C) 2007,2008 Øyvind Harboe * + * oyvind.harboe@zylin.com * + * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * @@ -32,6 +35,7 @@ #include "breakpoints.h" #include "flash.h" #include "target_request.h" +#include "configuration.h" #include #include @@ -42,7 +46,15 @@ #define _DEBUG_GDB_IO_ #endif +static int gdb_breakpoint_override; +static enum breakpoint_type gdb_breakpoint_override_type; + +extern int gdb_error(connection_t *connection, int retval); static unsigned short gdb_port; +static const char *DIGITS = "0123456789abcdef"; + +static void gdb_log_callback(void *priv, const char *file, int line, + const char *function, const char *string); enum gdb_detach_mode { @@ -57,8 +69,14 @@ enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME; /* set if we are sending a memory map to gdb * via qXfer:memory-map:read packet */ -int gdb_use_memory_map = 0; -int gdb_flash_program = 0; +/* enabled by default*/ +int gdb_use_memory_map = 1; +/* enabled by default*/ +int gdb_flash_program = 1; + +/* if set, data aborts cause an error to be reported in memory read packets + * see the code in gdb_read_memory_packet() for further explanations */ +int gdb_report_data_abort = 0; int gdb_last_signal(target_t *target) { @@ -75,14 +93,56 @@ int gdb_last_signal(target_t *target) case DBG_REASON_NOTHALTED: return 0x0; /* no signal... shouldn't happen */ default: - ERROR("BUG: undefined debug reason"); - exit(-1); + LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason); + return 0x0; + } +} + +int check_pending(connection_t *connection, int timeout_s, int *got_data) +{ + /* a non-blocking socket will block if there is 0 bytes available on the socket, + * but return with as many bytes as are available immediately + */ + struct timeval tv; + fd_set read_fds; + gdb_connection_t *gdb_con = connection->priv; + int t; + if (got_data==NULL) + got_data=&t; + *got_data=0; + + if (gdb_con->buf_cnt>0) + { + *got_data = 1; + return ERROR_OK; + } + + FD_ZERO(&read_fds); + FD_SET(connection->fd, &read_fds); + + tv.tv_sec = timeout_s; + tv.tv_usec = 0; + if (select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0) + { + /* This can typically be because a "monitor" command took too long + * before printing any progress messages + */ + if (timeout_s>0) + { + return ERROR_GDB_TIMEOUT; + } else + { + return ERROR_OK; + } } + *got_data=FD_ISSET(connection->fd, &read_fds)!=0; + return ERROR_OK; } int gdb_get_char(connection_t *connection, int* next_char) { gdb_connection_t *gdb_con = connection->priv; + int retval=ERROR_OK; #ifdef _DEBUG_GDB_IO_ char *debug_buffer; @@ -97,16 +157,27 @@ int gdb_get_char(connection_t *connection, int* next_char) connection->input_pending = 0; #ifdef _DEBUG_GDB_IO_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); + LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); #endif return ERROR_OK; } - while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0) + for (;;) { + retval=check_pending(connection, 1, NULL); + if (retval!=ERROR_OK) + return retval; + gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE); + if (gdb_con->buf_cnt > 0) + { + break; + } if (gdb_con->buf_cnt == 0) + { + gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; + } #ifdef _WIN32 errno = WSAGetLastError(); @@ -117,11 +188,13 @@ int gdb_get_char(connection_t *connection, int* next_char) usleep(1000); break; case WSAECONNABORTED: + gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; case WSAECONNRESET: + gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; default: - ERROR("read: %d", errno); + LOG_ERROR("read: %d", errno); exit(-1); } #else @@ -131,12 +204,15 @@ int gdb_get_char(connection_t *connection, int* next_char) usleep(1000); break; case ECONNABORTED: + gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; case ECONNRESET: + gdb_con->closed = 1; return ERROR_SERVER_REMOTE_CLOSED; default: - ERROR("read: %s", strerror(errno)); - exit(-1); + LOG_ERROR("read: %s", strerror(errno)); + gdb_con->closed = 1; + return ERROR_SERVER_REMOTE_CLOSED; } #endif } @@ -145,7 +221,7 @@ int gdb_get_char(connection_t *connection, int* next_char) debug_buffer = malloc(gdb_con->buf_cnt + 1); memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt); debug_buffer[gdb_con->buf_cnt] = 0; - DEBUG("received '%s'", debug_buffer); + LOG_DEBUG("received '%s'", debug_buffer); free(debug_buffer); #endif @@ -155,12 +231,12 @@ int gdb_get_char(connection_t *connection, int* next_char) if (gdb_con->buf_cnt > 0) connection->input_pending = 1; else - connection->input_pending = 0; + connection->input_pending = 0; #ifdef _DEBUG_GDB_IO_ - DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); + LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char); #endif - return ERROR_OK; + return retval; } int gdb_putback_char(connection_t *connection, int last_char) @@ -174,18 +250,36 @@ int gdb_putback_char(connection_t *connection, int last_char) } else { - ERROR("BUG: couldn't put character back"); + LOG_ERROR("BUG: couldn't put character back"); } return ERROR_OK; } -int gdb_put_packet(connection_t *connection, char *buffer, int len) +/* The only way we can detect that the socket is closed is the first time + * we write to it, we will fail. Subsequent write operations will + * succeed. Shudder! */ +int gdb_write(connection_t *connection, void *data, int len) +{ + gdb_connection_t *gdb_con = connection->priv; + if (gdb_con->closed) + return ERROR_SERVER_REMOTE_CLOSED; + + if (write_socket(connection->fd, data, len) == len) + { + return ERROR_OK; + } + gdb_con->closed = 1; + return ERROR_SERVER_REMOTE_CLOSED; +} + +int gdb_put_packet_inner(connection_t *connection, char *buffer, int len) { int i; unsigned char my_checksum = 0; - char checksum[3]; +#ifdef _DEBUG_GDB_IO_ char *debug_buffer; +#endif int reply; int retval; gdb_connection_t *gdb_con = connection->priv; @@ -193,30 +287,72 @@ int gdb_put_packet(connection_t *connection, char *buffer, int len) for (i = 0; i < len; i++) my_checksum += buffer[i]; +#ifdef _DEBUG_GDB_IO_ + /* + * At this point we should have nothing in the input queue from GDB, + * however sometimes '-' is sent even though we've already received + * an ACK (+) for everything we've sent off. + */ + int gotdata; + for (;;) + { + if ((retval=check_pending(connection, 0, &gotdata))!=ERROR_OK) + return retval; + if (!gotdata) + break; + if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) + return retval; + LOG_WARNING("Discard unexpected char %c", reply); + } +#endif + while (1) { +#ifdef _DEBUG_GDB_IO_ debug_buffer = malloc(len + 1); memcpy(debug_buffer, buffer, len); debug_buffer[len] = 0; - DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); + LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum); free(debug_buffer); +#endif - write_socket(connection->fd, "$", 1); - if (len > 0) - write_socket(connection->fd, buffer, len); - write_socket(connection->fd, "#", 1); - - snprintf(checksum, 3, "%2.2x", my_checksum); - - write_socket(connection->fd, checksum, 2); - + char local_buffer[1024]; + local_buffer[0] = '$'; + if (len+4 <= sizeof(local_buffer)) + { + /* performance gain on smaller packets by only a single call to gdb_write() */ + memcpy(local_buffer+1, buffer, len++); + local_buffer[len++] = '#'; + local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf]; + local_buffer[len++] = DIGITS[my_checksum & 0xf]; + gdb_write(connection, local_buffer, len); + } + else + { + /* larger packets are transmitted directly from caller supplied buffer + by several calls to gdb_write() to avoid dynamic allocation */ + local_buffer[1] = '#'; + local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf]; + local_buffer[3] = DIGITS[my_checksum & 0xf]; + gdb_write(connection, local_buffer, 1); + gdb_write(connection, buffer, len); + gdb_write(connection, local_buffer+1, 3); + } + + if (gdb_con->noack_mode) + break; + if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK) return retval; if (reply == '+') break; else if (reply == '-') - WARNING("negative reply, retrying"); + { + /* Stop sending output packets for now */ + log_remove_callback(gdb_log_callback, connection); + LOG_WARNING("negative reply, retrying"); + } else if (reply == 0x3) { gdb_con->ctrl_c = 1; @@ -225,24 +361,41 @@ int gdb_put_packet(connection_t *connection, char *buffer, int len) if (reply == '+') break; else if (reply == '-') - WARNING("negative reply, retrying"); + { + /* Stop sending output packets for now */ + log_remove_callback(gdb_log_callback, connection); + LOG_WARNING("negative reply, retrying"); + } else { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + LOG_ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + gdb_con->closed=1; return ERROR_SERVER_REMOTE_CLOSED; } } else { - ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + LOG_ERROR("unknown character 0x%2.2x in reply, dropping connection", reply); + gdb_con->closed=1; return ERROR_SERVER_REMOTE_CLOSED; } } + if (gdb_con->closed) + return ERROR_SERVER_REMOTE_CLOSED; return ERROR_OK; } -int gdb_get_packet(connection_t *connection, char *buffer, int *len) +int gdb_put_packet(connection_t *connection, char *buffer, int len) +{ + gdb_connection_t *gdb_con = connection->priv; + gdb_con->busy = 1; + int retval = gdb_put_packet_inner(connection, buffer, len); + gdb_con->busy = 0; + return retval; +} + +int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len) { int character; int count = 0; @@ -259,7 +412,7 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) return retval; #ifdef _DEBUG_GDB_IO_ - DEBUG("character: '%c'", character); + LOG_DEBUG("character: '%c'", character); #endif switch (character) @@ -267,29 +420,89 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) case '$': break; case '+': - WARNING("acknowledgment received, but no packet pending"); + /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c) + * incase anyone tries to debug why they receive this warning every time */ + LOG_WARNING("acknowledgment received, but no packet pending"); break; case '-': - WARNING("negative acknowledgment, but no packet pending"); + LOG_WARNING("negative acknowledgment, but no packet pending"); break; case 0x3: gdb_con->ctrl_c = 1; *len = 0; return ERROR_OK; default: - WARNING("ignoring character 0x%x", character); + LOG_WARNING("ignoring character 0x%x", character); break; } } while (character != '$'); my_checksum = 0; - do + count = 0; + gdb_connection_t *gdb_con = connection->priv; + for (;;) { + /* The common case is that we have an entire packet with no escape chars. + * We need to leave at least 2 bytes in the buffer to have + * gdb_get_char() update various bits and bobs correctly. + */ + if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len)) + { + /* The compiler will struggle a bit with constant propagation and + * aliasing, so we help it by showing that these values do not + * change inside the loop + */ + int i; + char *buf = gdb_con->buf_p; + int run = gdb_con->buf_cnt - 2; + i = 0; + int done = 0; + while (i < run) + { + character = *buf++; + i++; + if (character == '#') + { + /* Danger! character can be '#' when esc is + * used so we need an explicit boolean for done here. + */ + done = 1; + break; + } + + if (character == '}') + { + /* data transmitted in binary mode (X packet) + * uses 0x7d as escape character */ + my_checksum += character & 0xff; + character = *buf++; + i++; + my_checksum += character & 0xff; + buffer[count++] = (character ^ 0x20) & 0xff; + } + else + { + my_checksum += character & 0xff; + buffer[count++] = character & 0xff; + } + } + gdb_con->buf_p += i; + gdb_con->buf_cnt -= i; + if (done) + break; + } + if (count > *len) + { + LOG_ERROR("packet buffer too small"); + return ERROR_GDB_BUFFER_TOO_SMALL; + } + if ((retval = gdb_get_char(connection, &character)) != ERROR_OK) return retval; - if (character == '#') break; + if (character == '#') + break; if (character == '}') { @@ -306,13 +519,7 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) my_checksum += character & 0xff; buffer[count++] = character & 0xff; } - - if (count > *len) - { - ERROR("packet buffer too small"); - return ERROR_GDB_BUFFER_TOO_SMALL; - } - } while (1); + } *len = count; @@ -326,106 +533,123 @@ int gdb_get_packet(connection_t *connection, char *buffer, int *len) if (my_checksum == strtoul(checksum, NULL, 16)) { - write_socket(connection->fd, "+", 1); + if (gdb_con->noack_mode) + break; + gdb_write(connection, "+", 1); break; } - WARNING("checksum error, requesting retransmission"); - write_socket(connection->fd, "-", 1); + if (!gdb_con->noack_mode) + { + LOG_WARNING("checksum error, requesting retransmission"); + gdb_write(connection, "-", 1); + } + else + { + LOG_WARNING("checksum error, no-ack-mode"); + break; + } } + if (gdb_con->closed) + return ERROR_SERVER_REMOTE_CLOSED; return ERROR_OK; } -int gdb_output(struct command_context_s *context, char* line) +int gdb_get_packet(connection_t *connection, char *buffer, int *len) +{ + gdb_connection_t *gdb_con = connection->priv; + gdb_con->busy = 1; + int retval = gdb_get_packet_inner(connection, buffer, len); + gdb_con->busy = 0; + return retval; +} + +int gdb_output_con(connection_t *connection, const char* line) { - connection_t *connection = context->output_handler_priv; - gdb_connection_t *gdb_connection = connection->priv; - char *hex_buffer; int i, bin_size; - /* check if output is enabled */ - if (gdb_connection->output_disable) - { - return ERROR_OK; - } - bin_size = strlen(line); - hex_buffer = malloc(bin_size*2 + 4); + hex_buffer = malloc(bin_size*2 + 2); + if (hex_buffer == NULL) + return ERROR_GDB_BUFFER_TOO_SMALL; hex_buffer[0] = 'O'; for (i=0; ipriv; - if (target->gdb_program_script) - { - script = fopen(target->gdb_program_script, "r"); - if (!script) + /* In the GDB protocol when we are stepping or coninuing execution, + * we have a lingering reply. Upon receiving a halted event + * when we have that lingering packet, we reply to the original + * step or continue packet. + * + * Executing monitor commands can bring the target in and + * out of the running state so we'll see lots of TARGET_EVENT_XXX + * that are to be ignored. + */ + if (gdb_connection->frontend_state == TARGET_RUNNING) + { + char sig_reply[4]; + int signal; + /* stop forwarding log packets! */ + log_remove_callback(gdb_log_callback, connection); + + if (gdb_connection->ctrl_c) + { + signal = 0x2; + gdb_connection->ctrl_c = 0; + } + else { - ERROR("couldn't open script file %s", target->gdb_program_script); - return ERROR_OK; + signal = gdb_last_signal(target); } - INFO("executing gdb_program script '%s'", target->gdb_program_script); - command_run_file(cmd_ctx, script, COMMAND_EXEC); - fclose(script); - - jtag_execute_queue(); + snprintf(sig_reply, 4, "T%2.2x", signal); + gdb_put_packet(connection, sig_reply, 3); + gdb_connection->frontend_state = TARGET_HALTED; } - - return ERROR_OK; } int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv) { connection_t *connection = priv; - gdb_connection_t *gdb_connection = connection->priv; - char sig_reply[4]; - int signal; switch (event) { case TARGET_EVENT_HALTED: - if (gdb_connection->frontend_state == TARGET_RUNNING) - { - if (gdb_connection->ctrl_c) - { - signal = 0x2; - gdb_connection->ctrl_c = 0; - } - else - { - signal = gdb_last_signal(target); - } - - snprintf(sig_reply, 4, "T%2.2x", signal); - gdb_put_packet(connection, sig_reply, 3); - gdb_connection->frontend_state = TARGET_HALTED; - } + gdb_frontend_halted(target, connection); break; - case TARGET_EVENT_RESUMED: - if (gdb_connection->frontend_state == TARGET_HALTED) - { - gdb_connection->frontend_state = TARGET_RUNNING; - } - break; - case TARGET_EVENT_GDB_PROGRAM: + case TARGET_EVENT_GDB_FLASH_ERASE_START: gdb_program_handler(target, event, connection->cmd_ctx); break; default: @@ -435,6 +659,7 @@ int gdb_target_callback_event_handler(struct target_s *target, enum target_event return ERROR_OK; } + int gdb_new_connection(connection_t *connection) { gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t)); @@ -450,31 +675,57 @@ int gdb_new_connection(connection_t *connection) gdb_connection->ctrl_c = 0; gdb_connection->frontend_state = TARGET_HALTED; gdb_connection->vflash_image = NULL; - gdb_connection->output_disable = 0; + gdb_connection->closed = 0; + gdb_connection->busy = 0; + gdb_connection->noack_mode = 0; + /* send ACK to GDB for debug request */ + gdb_write(connection, "+", 1); + /* output goes through gdb connection */ command_set_output_handler(connection->cmd_ctx, gdb_output, connection); + /* we must remove all breakpoints registered to the target as a previous + * GDB session could leave dangling breakpoints if e.g. communication + * timed out. + */ + breakpoint_clear_target(gdb_service->target); + watchpoint_clear_target(gdb_service->target); + /* register callback to be informed about target events */ - target_register_event_callback(gdb_target_callback_event_handler, connection); - - /* a gdb session just attached, put the target in halt mode */ - if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) && - (retval != ERROR_TARGET_ALREADY_HALTED)) - { - ERROR("error when trying to halt target"); - exit(-1); - } - - while (gdb_service->target->state != TARGET_HALTED) - { - gdb_service->target->type->poll(gdb_service->target); - } - + target_register_event_callback(gdb_target_callback_event_handler, connection); + + /* a gdb session just attached, try to put the target in halt mode. + * + * DANGER!!!! + * + * If the halt fails(e.g. target needs a reset, JTAG communication not + * working, etc.), then the GDB connect will succeed as + * the get_gdb_reg_list() will lie and return a register list with + * dummy values. + * + * This allows GDB monitor commands to be run from a GDB init script to + * initialize the target + * + * Also, since the halt() is asynchronous target connect will be + * instantaneous and thus avoiding annoying timeout problems during + * connect. + */ + target_halt(gdb_service->target); + /* FIX!!!! could extended-remote work better here? + * + * wait a tiny bit for halted state or we just continue. The + * GDB register packet will then contain garbage + */ + target_wait_state(gdb_service->target, TARGET_HALTED, 500); + /* remove the initial ACK from the incoming buffer */ if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK) return retval; + /* FIX!!!??? would we actually ever receive a + here??? + * Not observed. + */ if (initial_ack != '+') gdb_putback_char(connection, initial_ack); @@ -496,7 +747,7 @@ int gdb_connection_closed(connection_t *connection) /* if this connection registered a debug-message receiver delete it */ delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target); - + if (connection->priv) { free(connection->priv); @@ -504,10 +755,11 @@ int gdb_connection_closed(connection_t *connection) } else { - ERROR("BUG: connection->priv == NULL"); + LOG_ERROR("BUG: connection->priv == NULL"); } target_unregister_event_callback(gdb_target_callback_event_handler, connection); + log_remove_callback(gdb_log_callback, connection); return ERROR_OK; } @@ -532,32 +784,23 @@ int gdb_last_signal_packet(connection_t *connection, target_t *target, char* pac return ERROR_OK; } -void gdb_str_to_target(target_t *target, char *str, char *tstr) +/* Convert register to string of bits. NB! The # of bits in the + * register might be non-divisible by 8(a byte), in which + * case an entire byte is shown. */ +void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg) { - int str_len = strlen(str); int i; - if (str_len % 2) - { - ERROR("BUG: gdb value with uneven number of characters encountered: %s", str); - exit(-1); - } + u8 *buf; + int buf_len; + buf = reg->value; + buf_len = CEIL(reg->size, 8); - if (target->endianness == TARGET_LITTLE_ENDIAN) + for (i = 0; i < buf_len; i++) { - for (i = 0; i < str_len; i+=2) - { - tstr[str_len - i - 1] = str[i + 1]; - tstr[str_len - i - 2] = str[i]; - } + tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf]; + tstr[i*2+1] = DIGITS[buf[i]&0xf]; } - else - { - for (i = 0; i < str_len; i++) - { - tstr[i] = str[i]; - } - } } void gdb_target_to_str(target_t *target, char *tstr, char *str) @@ -567,25 +810,15 @@ void gdb_target_to_str(target_t *target, char *tstr, char *str) if (str_len % 2) { - ERROR("BUG: gdb value with uneven number of characters encountered"); + LOG_ERROR("BUG: gdb value with uneven number of characters encountered"); exit(-1); } - if (target->endianness == TARGET_LITTLE_ENDIAN) + for (i = 0; i < str_len; i+=2) { - for (i = 0; i < str_len; i+=2) - { - str[str_len - i - 1] = tstr[i + 1]; - str[str_len - i - 2] = tstr[i]; - } + str[str_len - i - 1] = tstr[i + 1]; + str[str_len - i - 2] = tstr[i]; } - else - { - for (i = 0; i < str_len; i++) - { - str[i] = tstr[i]; - } - } } int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size) @@ -598,20 +831,13 @@ int gdb_get_registers_packet(connection_t *connection, target_t *target, char* p char *reg_packet_p; int i; - DEBUG("-"); +#ifdef _DEBUG_GDB_IO_ + LOG_DEBUG("-"); +#endif if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } + return gdb_error(connection, retval); } for (i = 0; i < reg_list_size; i++) @@ -624,16 +850,18 @@ int gdb_get_registers_packet(connection_t *connection, target_t *target, char* p for (i = 0; i < reg_list_size; i++) { - char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16); - DEBUG("hex_buf: %s", hex_buf); - gdb_str_to_target(target, hex_buf, reg_packet_p); + gdb_str_to_target(target, reg_packet_p, reg_list[i]); reg_packet_p += CEIL(reg_list[i]->size, 8) * 2; - free(hex_buf); } - reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2); - DEBUG("reg_packet: %s", reg_packet_p); - free(reg_packet_p); +#ifdef _DEBUG_GDB_IO_ + { + char *reg_packet_p; + reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2); + LOG_DEBUG("reg_packet: %s", reg_packet_p); + free(reg_packet_p); + } +#endif gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2); free(reg_packet); @@ -651,7 +879,9 @@ int gdb_set_registers_packet(connection_t *connection, target_t *target, char *p int retval; char *packet_p; - DEBUG("-"); +#ifdef _DEBUG_GDB_IO_ + LOG_DEBUG("-"); +#endif /* skip command character */ packet++; @@ -659,22 +889,13 @@ int gdb_set_registers_packet(connection_t *connection, target_t *target, char *p if (packet_size % 2) { - WARNING("GDB set_registers packet with uneven characters received, dropping connection"); + LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } + return gdb_error(connection, retval); } packet_p = packet; @@ -692,23 +913,23 @@ int gdb_set_registers_packet(connection_t *connection, target_t *target, char *p bin_buf = malloc(CEIL(reg_list[i]->size, 8)); str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16); - /* get register arch_type, and call set method */ + /* get register arch_type, and call set method */ arch_type = register_get_arch_type(reg_list[i]->arch_type); if (arch_type == NULL) { - ERROR("BUG: encountered unregistered arch type"); + LOG_ERROR("BUG: encountered unregistered arch type"); exit(-1); } arch_type->set(reg_list[i], bin_buf); - /* advance packet pointer */ + /* advance packet pointer */ packet_p += (CEIL(reg_list[i]->size, 8) * 2); free(bin_buf); free(hex_buf); } - /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ + /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */ free(reg_list); gdb_put_packet(connection, "OK", 2); @@ -723,41 +944,30 @@ int gdb_get_register_packet(connection_t *connection, target_t *target, char *pa reg_t **reg_list; int reg_list_size; int retval; - char *hex_buf; - DEBUG("-"); +#ifdef _DEBUG_GDB_IO_ + LOG_DEBUG("-"); +#endif if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb requested registers but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } + return gdb_error(connection, retval); } if (reg_list_size <= reg_num) { - ERROR("gdb requested a non-existing register"); + LOG_ERROR("gdb requested a non-existing register"); exit(-1); } reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2); - hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16); - - gdb_str_to_target(target, hex_buf, reg_packet); + gdb_str_to_target(target, reg_packet, reg_list[reg_num]); gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2); free(reg_list); free(reg_packet); - free(hex_buf); return ERROR_OK; } @@ -773,31 +983,22 @@ int gdb_set_register_packet(connection_t *connection, target_t *target, char *pa int retval; reg_arch_type_t *arch_type; - DEBUG("-"); + LOG_DEBUG("-"); if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK) { - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to set a register but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - default: - /* this is a bug condition - get_gdb_reg_list() may not return any other error */ - ERROR("BUG: unexpected error returned by get_gdb_reg_list()"); - exit(-1); - } + return gdb_error(connection, retval); } if (reg_list_size < reg_num) { - ERROR("gdb requested a non-existing register"); - return ERROR_SERVER_REMOTE_CLOSED; + LOG_ERROR("gdb requested a non-existing register"); + return ERROR_SERVER_REMOTE_CLOSED; } if (*separator != '=') { - ERROR("GDB 'set register packet', but no '=' following the register number"); + LOG_ERROR("GDB 'set register packet', but no '=' following the register number"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -809,11 +1010,11 @@ int gdb_set_register_packet(connection_t *connection, target_t *target, char *pa bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8)); str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16); - /* get register arch_type, and call set method */ + /* get register arch_type, and call set method */ arch_type = register_get_arch_type(reg_list[reg_num]->arch_type); if (arch_type == NULL) { - ERROR("BUG: encountered unregistered arch type"); + LOG_ERROR("BUG: encountered unregistered arch type"); exit(-1); } arch_type->set(reg_list[reg_num], bin_buf); @@ -827,14 +1028,10 @@ int gdb_set_register_packet(connection_t *connection, target_t *target, char *pa return ERROR_OK; } -int gdb_memory_packet_error(connection_t *connection, int retval) +int gdb_error(connection_t *connection, int retval) { switch (retval) { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to read memory but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - break; case ERROR_TARGET_DATA_ABORT: gdb_send_error(connection, EIO); break; @@ -844,14 +1041,24 @@ int gdb_memory_packet_error(connection_t *connection, int retval) case ERROR_TARGET_UNALIGNED_ACCESS: gdb_send_error(connection, EFAULT); break; + case ERROR_TARGET_NOT_HALTED: + gdb_send_error(connection, EFAULT); + break; default: - ERROR("BUG: unexpected error %i", retval); - exit(-1); + /* This could be that the target reset itself. */ + LOG_ERROR("unexpected error %i", retval); + gdb_send_error(connection, EFAULT); + break; } return ERROR_OK; } +/* We don't have to worry about the default 2 second timeout for GDB packets, + * because GDB breaks up large memory reads into smaller reads. + * + * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192????? + */ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) { char *separator; @@ -861,8 +1068,7 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac u8 *buffer; char *hex_buffer; - int i; - int retval; + int retval = ERROR_OK; /* skip command character */ packet++; @@ -871,7 +1077,7 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac if (*separator != ',') { - ERROR("incomplete read memory packet received, dropping connection"); + LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -879,35 +1085,39 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac buffer = malloc(len); - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + + retval = target_read_buffer(target, addr, len, buffer); - switch (len) + if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort)) { - case 4: - if ((addr % 4) == 0) - retval = target->type->read_memory(target, addr, 4, 1, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->read_memory(target, addr, 2, 1, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); - break; - default: - if (((addr % 4) == 0) && ((len % 4) == 0)) - retval = target->type->read_memory(target, addr, 4, len / 4, buffer); - else - retval = target->type->read_memory(target, addr, 1, len, buffer); + /* TODO : Here we have to lie and send back all zero's lest stack traces won't work. + * At some point this might be fixed in GDB, in which case this code can be removed. + * + * OpenOCD developers are acutely aware of this problem, but there is nothing + * gained by involving the user in this problem that hopefully will get resolved + * eventually + * + * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395 + * + * For now, the default is to fix up things to make current GDB versions work. + * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command. + */ + memset(buffer, 0, len); + retval = ERROR_OK; } if (retval == ERROR_OK) { hex_buffer = malloc(len * 2 + 1); - for (i=0; i> 4) & 0xf]; + hex_buffer[2 * i + 1] = DIGITS[t & 0xf]; + } gdb_put_packet(connection, hex_buffer, len * 2); @@ -915,13 +1125,12 @@ int gdb_read_memory_packet(connection_t *connection, target_t *target, char *pac } else { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; + retval = gdb_error(connection, retval); } free(buffer); - return ERROR_OK; + return retval; } int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size) @@ -942,7 +1151,7 @@ int gdb_write_memory_packet(connection_t *connection, target_t *target, char *pa if (*separator != ',') { - ERROR("incomplete write memory packet received, dropping connection"); + LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -950,13 +1159,13 @@ int gdb_write_memory_packet(connection_t *connection, target_t *target, char *pa if (*(separator++) != ':') { - ERROR("incomplete write memory packet received, dropping connection"); + LOG_ERROR("incomplete write memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } buffer = malloc(len); - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); + LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); for (i=0; itype->write_memory(target, addr, 4, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->write_memory(target, addr, 2, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 3: - case 1: - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - /* handle bulk writes */ - default: - retval = target_write_buffer(target, addr, len, buffer); - break; - } + retval = target_write_buffer(target, addr, len, buffer); if (retval == ERROR_OK) { @@ -997,13 +1182,12 @@ int gdb_write_memory_packet(connection_t *connection, target_t *target, char *pa } else { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; + retval = gdb_error(connection, retval); } free(buffer); - return ERROR_OK; + return retval; } int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size) @@ -1012,7 +1196,6 @@ int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, c u32 addr = 0; u32 len = 0; - u8 *buffer; int retval; /* skip command character */ @@ -1022,7 +1205,7 @@ int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, c if (*separator != ',') { - ERROR("incomplete write memory binary packet received, dropping connection"); + LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1030,43 +1213,16 @@ int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, c if (*(separator++) != ':') { - ERROR("incomplete write memory binary packet received, dropping connection"); + LOG_ERROR("incomplete write memory binary packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } retval = ERROR_OK; - if( len ) { + if (len) + { + LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - buffer = malloc(len); - - DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len); - - memcpy( buffer, separator, len ); - - switch (len) - { - case 4: - if ((addr % 4) == 0) - retval = target->type->write_memory(target, addr, 4, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 2: - if ((addr % 2) == 0) - retval = target->type->write_memory(target, addr, 2, 1, buffer); - else - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - case 3: - case 1: - retval = target->type->write_memory(target, addr, 1, len, buffer); - break; - default: - retval = target_write_buffer(target, addr, len, buffer); - break; - } - - free(buffer); + retval = target_write_buffer(target, addr, len, (u8*)separator); } if (retval == ERROR_OK) @@ -1075,19 +1231,20 @@ int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, c } else { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; + if ((retval = gdb_error(connection, retval)) != ERROR_OK) + return retval; } return ERROR_OK; } -void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size) +int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size) { int current = 0; u32 address = 0x0; + int retval=ERROR_OK; - DEBUG("-"); + LOG_DEBUG("-"); if (packet_size > 1) { @@ -1101,33 +1258,16 @@ void gdb_step_continue_packet(connection_t *connection, target_t *target, char * if (packet[0] == 'c') { - DEBUG("continue"); - target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ + LOG_DEBUG("continue"); + target_invoke_script(connection->cmd_ctx, target, "pre_resume"); + retval=target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */ } else if (packet[0] == 's') { - DEBUG("step"); - target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */ + LOG_DEBUG("step"); + retval=target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */ } -} - -int gdb_bp_wp_packet_error(connection_t *connection, int retval) -{ - switch (retval) - { - case ERROR_TARGET_NOT_HALTED: - ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection"); - return ERROR_SERVER_REMOTE_CLOSED; - break; - case ERROR_TARGET_RESOURCE_NOT_AVAILABLE: - gdb_send_error(connection, EBUSY); - break; - default: - ERROR("BUG: unexpected error %i", retval); - exit(-1); - } - - return ERROR_OK; + return retval; } int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size) @@ -1140,7 +1280,7 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *separator; int retval; - DEBUG("-"); + LOG_DEBUG("-"); type = strtoul(packet + 1, &separator, 16); @@ -1154,10 +1294,15 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, wp_type = WPT_READ; else if (type == 4) /* access watchpoint */ wp_type = WPT_ACCESS; + + if (gdb_breakpoint_override&&((bp_type==BKPT_SOFT)||(bp_type==BKPT_HARD))) + { + bp_type=gdb_breakpoint_override_type; + } if (*separator != ',') { - ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); + LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1165,7 +1310,7 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, if (*separator != ',') { - ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); + LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1179,7 +1324,7 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, { if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK) { - if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK) + if ((retval = gdb_error(connection, retval)) != ERROR_OK) return retval; } else @@ -1201,7 +1346,7 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, { if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK) { - if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK) + if ((retval = gdb_error(connection, retval)) != ERROR_OK) return retval; } else @@ -1223,7 +1368,7 @@ int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, return ERROR_OK; } -/* print out XML and allocate more space as needed */ +/* print out a string and allocate more space as needed, mainly used for XML at this point */ void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...) { if (*retval != ERROR_OK) @@ -1231,42 +1376,45 @@ void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, . return; } int first = 1; - + for (;;) { if ((*xml == NULL) || (!first)) { /* start by 0 to exercise all the code paths. * Need minimum 2 bytes to fit 1 char and 0 terminator. */ - + *size = *size * 2 + 2; + char *t = *xml; *xml = realloc(*xml, *size); if (*xml == NULL) { - *retval = 1; + if (t) + free(t); + *retval = ERROR_SERVER_REMOTE_CLOSED; return; } } - - va_list ap; - int ret; - va_start(ap, fmt); - ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap); - va_end(ap); - if ((ret > 0) && ((ret + 1) < *size - *pos)) - { - *pos += ret; - return; - } - /* there was just enough or not enough space, allocate more. */ - first = 0; + + va_list ap; + int ret; + va_start(ap, fmt); + ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap); + va_end(ap); + if ((ret > 0) && ((ret + 1) < *size - *pos)) + { + *pos += ret; + return; + } + /* there was just enough or not enough space, allocate more. */ + first = 0; } } -static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *len) +static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len) { char *separator; - + /* Extract and NUL-terminate the annex. */ *annex = buf; while (*buf && *buf != ':') @@ -1274,24 +1422,58 @@ static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *le if (*buf == '\0') return -1; *buf++ = 0; - + /* After the read marker and annex, qXfer looks like a * traditional 'm' packet. */ - + *ofs = strtoul(buf, &separator, 16); if (*separator != ',') return -1; *len = strtoul(separator+1, NULL, 16); - + return 0; } +int gdb_calc_blocksize(flash_bank_t *bank) +{ + int i; + int block_size = 0xffffffff; + + /* loop through all sectors and return smallest sector size */ + + for (i = 0; i < bank->num_sectors; i++) + { + if (bank->sectors[i].size < block_size) + block_size = bank->sectors[i].size; + } + + return block_size; +} + +static int compare_bank (const void * a, const void * b) +{ + flash_bank_t *b1, *b2; + b1=*((flash_bank_t **)a); + b2=*((flash_bank_t **)b); + + if (b1->base==b2->base) + { + return 0; + } else if (b1->base>b2->base) + { + return 1; + } else + { + return -1; + } +} + int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size) { - char buffer[GDB_BUFFER_SIZE]; command_context_t *cmd_ctx = connection->cmd_ctx; + gdb_connection_t *gdb_connection = connection->priv; if (strstr(packet, "qRcmd,")) { @@ -1307,7 +1489,13 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i cmd[i] = tmp; } cmd[(packet_size - 6)/2] = 0x0; + + /* We want to print all debug output to GDB connection */ + log_add_callback(gdb_log_callback, connection); + target_call_timer_callbacks_now(); command_run_line(cmd_ctx, cmd); + target_call_timer_callbacks_now(); + log_remove_callback(gdb_log_callback, connection); free(cmd); } gdb_put_packet(connection, "OK", 2); @@ -1318,27 +1506,27 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i if (packet_size > 5) { int retval; - u8 gdb_reply[10]; + char gdb_reply[10]; char *separator; u32 checksum; u32 addr = 0; u32 len = 0; - + /* skip command character */ packet += 5; - + addr = strtoul(packet, &separator, 16); - + if (*separator != ',') { - ERROR("incomplete read memory packet received, dropping connection"); + LOG_ERROR("incomplete read memory packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } - + len = strtoul(separator + 1, NULL, 16); - + retval = target_checksum_memory(target, addr, len, &checksum); - + if (retval == ERROR_OK) { snprintf(gdb_reply, 10, "C%8.8x", checksum); @@ -1346,10 +1534,10 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i } else { - if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK) - return retval; + if ((retval = gdb_error(connection, retval)) != ERROR_OK) + return retval; } - + return ERROR_OK; } } @@ -1357,53 +1545,110 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i { /* we currently support packet size and qXfer:memory-map:read (if enabled) * disable qXfer:features:read for the moment */ - - sprintf(buffer, "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-", - (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-'); - + int retval = ERROR_OK; + char *buffer = NULL; + int pos = 0; + int size = 0; + + xml_printf(&retval, &buffer, &pos, &size, + "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+", + (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1)&&(flash_get_bank_count()>0)) ? '+' : '-'); + + if (retval != ERROR_OK) + { + gdb_send_error(connection, 01); + return ERROR_OK; + } + gdb_put_packet(connection, buffer, strlen(buffer)); + free(buffer); + return ERROR_OK; } - else if (strstr(packet, "qXfer:memory-map:read::")) + else if (strstr(packet, "qXfer:memory-map:read::")&&(flash_get_bank_count()>0)) { /* We get away with only specifying flash here. Regions that are not - * specified are treated as if we provided no memory map(if not we + * specified are treated as if we provided no memory map(if not we * could detect the holes and mark them as RAM). * Normally we only execute this code once, but no big deal if we * have to regenerate it a couple of times. */ - + flash_bank_t *p; char *xml = NULL; int size = 0; int pos = 0; int retval = ERROR_OK; - + int offset; int length; char *separator; - + int blocksize; + /* skip command character */ packet += 23; - + offset = strtoul(packet, &separator, 16); length = strtoul(separator + 1, &separator, 16); - + xml_printf(&retval, &xml, &pos, &size, "\n"); + + /* + sort banks in ascending order, we need to make non-flash memory be ram(or rather + read/write) by default for GDB. + GDB does not have a concept of non-cacheable read/write memory. + */ + flash_bank_t **banks=malloc(sizeof(flash_bank_t *)*flash_get_bank_count()); + int i; - int i = 0; - for (;;) + for (i=0; ibase) + { + xml_printf(&retval, &xml, &pos, &size, "\n", + ram_start, p->base-ram_start); + } + /* if device has uneven sector sizes, eg. str7, lpc + * we pass the smallest sector size to gdb memory map */ + blocksize = gdb_calc_blocksize(p); + xml_printf(&retval, &xml, &pos, &size, "\n" \ "0x%x\n" \ "\n", \ - p->base, p->size, p->size/p->num_sectors); - i++; + p->base, p->size, blocksize); + ram_start=p->base+p->size; + } + if (ram_start!=0) + { + xml_printf(&retval, &xml, &pos, &size, "\n", + ram_start, 0-ram_start); + } else + { + /* a flash chip could be at the very end of the 32 bit address space, in which case + ram_start will be precisely 0 */ } + free(banks); + banks = NULL; + xml_printf(&retval, &xml, &pos, &size, "\n"); if (retval != ERROR_OK) @@ -1411,7 +1656,7 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i gdb_send_error(connection, retval); return retval; } - + if (offset + length > pos) { length = pos - offset; @@ -1421,52 +1666,58 @@ int gdb_query_packet(connection_t *connection, target_t *target, char *packet, i t[0] = 'l'; memcpy(t + 1, xml + offset, length); gdb_put_packet(connection, t, length + 1); - + free(t); free(xml); return ERROR_OK; } else if (strstr(packet, "qXfer:features:read:")) - { + { char *xml = NULL; int size = 0; int pos = 0; int retval = ERROR_OK; - + int offset; - int length; + unsigned int length; char *annex; - + /* skip command character */ packet += 20; - - if (decode_xfer_read( packet, &annex, &offset, &length ) < 0) + + if (decode_xfer_read(packet, &annex, &offset, &length) < 0) { gdb_send_error(connection, 01); return ERROR_OK; } - + if (strcmp(annex, "target.xml") != 0) { gdb_send_error(connection, 01); return ERROR_OK; } - + xml_printf(&retval, &xml, &pos, &size, \ "l\narm\n\n"); - + if (retval != ERROR_OK) { gdb_send_error(connection, retval); return retval; } - - gdb_put_packet(connection, xml, strlen(xml) + 1); - + + gdb_put_packet(connection, xml, strlen(xml)); + free(xml); return ERROR_OK; } - + else if (strstr(packet, "QStartNoAckMode")) + { + gdb_connection->noack_mode = 1; + gdb_put_packet(connection, "OK", 2); + return ERROR_OK; + } + gdb_put_packet(connection, "", 0); return ERROR_OK; } @@ -1478,22 +1729,22 @@ int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int p int result; /* if flash programming disabled - send a empty reply */ - + if (gdb_flash_program == 0) { gdb_put_packet(connection, "", 0); return ERROR_OK; } - + if (strstr(packet, "vFlashErase:")) { unsigned long addr; unsigned long length; - + char *parse = packet + 12; if (*parse == '\0') { - ERROR("incomplete vFlashErase packet received, dropping connection"); + LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1501,7 +1752,7 @@ int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int p if (*(parse++) != ',' || *parse == '\0') { - ERROR("incomplete vFlashErase packet received, dropping connection"); + LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } @@ -1509,35 +1760,29 @@ int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int p if (*parse != '\0') { - ERROR("incomplete vFlashErase packet received, dropping connection"); + LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } - - /* disable gdb output while programming */ - gdb_connection->output_disable = 1; - + /* assume all sectors need erasing - stops any problems * when flash_write is called multiple times */ flash_set_dirty(); - + /* perform any target specific operations before the erase */ - target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM); - + target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START); + /* perform erase */ - if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK) + if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK) { /* GDB doesn't evaluate the actual error number returned, * treat a failed erase as an I/O error */ gdb_send_error(connection, EIO); - ERROR("flash_erase returned %i", result); + LOG_ERROR("flash_erase returned %i", result); } else gdb_put_packet(connection, "OK", 2); - - /* reenable gdb output */ - gdb_connection->output_disable = 0; - + return ERROR_OK; } @@ -1549,20 +1794,17 @@ int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int p if (*parse == '\0') { - ERROR("incomplete vFlashErase packet received, dropping connection"); + LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } addr = strtoul(parse, &parse, 16); if (*(parse++) != ':') { - ERROR("incomplete vFlashErase packet received, dropping connection"); + LOG_ERROR("incomplete vFlashErase packet received, dropping connection"); return ERROR_SERVER_REMOTE_CLOSED; } length = packet_size - (parse - packet); - - /* disable gdb output while programming */ - gdb_connection->output_disable = 1; - + /* create a new image if there isn't already one */ if (gdb_connection->vflash_image == NULL) { @@ -1575,47 +1817,32 @@ int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int p gdb_put_packet(connection, "OK", 2); - /* reenable gdb output */ - gdb_connection->output_disable = 0; - return ERROR_OK; } if (!strcmp(packet, "vFlashDone")) { u32 written; - char *error_str; - /* disable gdb output while programming */ - gdb_connection->output_disable = 1; - - /* process the flashing buffer */ - if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK) + /* process the flashing buffer. No need to erase as GDB + * always issues a vFlashErase first. */ + if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0)) != ERROR_OK) { if (result == ERROR_FLASH_DST_OUT_OF_BANK) gdb_put_packet(connection, "E.memtype", 9); else gdb_send_error(connection, EIO); - - if (error_str) - { - ERROR("flash writing failed: %s", error_str); - free(error_str); } - } else { - DEBUG("wrote %u bytes from vFlash image to flash", written); + LOG_DEBUG("wrote %u bytes from vFlash image to flash", written); gdb_put_packet(connection, "OK", 2); } - + image_close(gdb_connection->vflash_image); free(gdb_connection->vflash_image); gdb_connection->vflash_image = NULL; - - /* reenable gdb output */ - gdb_connection->output_disable = 0; - + return ERROR_OK; } @@ -1628,31 +1855,59 @@ int gdb_detach(connection_t *connection, target_t *target) switch( detach_mode ) { case GDB_DETACH_RESUME: - target->type->resume(target, 1, 0, 1, 0); + target_invoke_script(connection->cmd_ctx, target, "pre_resume"); + target_resume(target, 1, 0, 1, 0); break; - + case GDB_DETACH_RESET: - target_process_reset(connection->cmd_ctx); + /* FIX?? make this configurable?? */ + target_process_reset(connection->cmd_ctx, RESET_HALT); break; - + case GDB_DETACH_HALT: - target->type->halt(target); + target_halt(target); break; - + case GDB_DETACH_NOTHING: break; } - + gdb_put_packet(connection, "OK", 2); - + return ERROR_OK; } -int gdb_input(connection_t *connection) +static void gdb_log_callback(void *priv, const char *file, int line, + const char *function, const char *string) +{ + connection_t *connection = priv; + gdb_connection_t *gdb_con = connection->priv; + + if (gdb_con->busy) + { + /* do not reply this using the O packet */ + return; + } + + gdb_output_con(connection, string); +} + +/* Do not allocate this on the stack */ +char gdb_packet_buffer[GDB_BUFFER_SIZE]; + +static void gdb_sig_halted(connection_t *connection) +{ + char sig_reply[4]; + snprintf(sig_reply, 4, "T%2.2x", 2); + gdb_put_packet(connection, sig_reply, 3); + +} + +int gdb_input_inner(connection_t *connection) { gdb_service_t *gdb_service = connection->service->priv; target_t *target = gdb_service->target; - char packet[GDB_BUFFER_SIZE]; + char *packet=gdb_packet_buffer; int packet_size; int retval; gdb_connection_t *gdb_con = connection->priv; @@ -1664,23 +1919,13 @@ int gdb_input(connection_t *connection) packet_size = GDB_BUFFER_SIZE-1; if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK) { - switch (retval) - { - case ERROR_GDB_BUFFER_TOO_SMALL: - ERROR("BUG: buffer supplied for gdb packet was too small"); - exit(-1); - case ERROR_SERVER_REMOTE_CLOSED: - return ERROR_SERVER_REMOTE_CLOSED; - default: - ERROR("BUG: unexpected error"); - exit(-1); - } + return retval; } /* terminate with zero */ packet[packet_size] = 0; - DEBUG("received packet: '%s'", packet); + LOG_DEBUG("received packet: '%s'", packet); if (packet_size > 0) { @@ -1688,11 +1933,12 @@ int gdb_input(connection_t *connection) switch (packet[0]) { case 'H': - /* Hct... -- set thread + /* Hct... -- set thread * we don't have threads, send empty reply */ gdb_put_packet(connection, NULL, 0); break; case 'q': + case 'Q': retval = gdb_query_packet(connection, target, packet, packet_size); break; case 'g': @@ -1722,7 +1968,29 @@ int gdb_input(connection_t *connection) break; case 'c': case 's': - gdb_step_continue_packet(connection, target, packet, packet_size); + { + if (target->state != TARGET_HALTED) + { + /* If the target isn't in the halted state, then we can't + * step/continue. This might be early setup, etc. + */ + gdb_sig_halted(connection); + } else + { + /* We're running/stepping, in which case we can + * forward log output until the target is halted + */ + gdb_connection_t *gdb_con = connection->priv; + gdb_con->frontend_state = TARGET_RUNNING; + log_add_callback(gdb_log_callback, connection); + int retval=gdb_step_continue_packet(connection, target, packet, packet_size); + if (retval!=ERROR_OK) + { + /* we'll never receive a halted condition... issue a false one.. */ + gdb_frontend_halted(target, connection); + } + } + } break; case 'v': retval = gdb_v_packet(connection, target, packet, packet_size); @@ -1747,11 +2015,13 @@ int gdb_input(connection_t *connection) break; case 'R': /* handle extended restart packet */ - target_process_reset(connection->cmd_ctx); + breakpoint_clear_target(gdb_service->target); + watchpoint_clear_target(gdb_service->target); + command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %d", get_num_by_target(target)); break; default: /* ignore unkown packets */ - DEBUG("ignoring 0x%2.2x packet", packet[0]); + LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]); gdb_put_packet(connection, NULL, 0); break; } @@ -1765,7 +2035,7 @@ int gdb_input(connection_t *connection) { if (target->state == TARGET_RUNNING) { - target->type->halt(target); + target_halt(target); gdb_con->ctrl_c = 0; } } @@ -1775,21 +2045,35 @@ int gdb_input(connection_t *connection) return ERROR_OK; } -int gdb_init() +int gdb_input(connection_t *connection) +{ + int retval = gdb_input_inner(connection); + gdb_connection_t *gdb_con = connection->priv; + if (retval == ERROR_SERVER_REMOTE_CLOSED) + return retval; + + /* logging does not propagate the error, yet can set th gdb_con->closed flag */ + if (gdb_con->closed) + return ERROR_SERVER_REMOTE_CLOSED; + + /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */ + return ERROR_OK; +} + +int gdb_init(void) { gdb_service_t *gdb_service; - target_t *target = targets; - int i = 0; + target_t *target = all_targets; if (!target) { - WARNING("no gdb ports allocated as no target has been specified"); + LOG_WARNING("no gdb ports allocated as no target has been specified"); return ERROR_OK; } if (gdb_port == 0) { - WARNING("no gdb port specified, using default port 3333"); + LOG_WARNING("no gdb port specified, using default port 3333"); gdb_port = 3333; } @@ -1797,16 +2081,21 @@ int gdb_init() { char service_name[8]; - snprintf(service_name, 8, "gdb-%2.2i", i); + snprintf(service_name, 8, "gdb-%2.2i", target->target_number); gdb_service = malloc(sizeof(gdb_service_t)); gdb_service->target = target; - add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service); + add_service("gdb", CONNECTION_GDB, + gdb_port + target->target_number, + 1, gdb_new_connection, gdb_input, + gdb_connection_closed, + gdb_service); - DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i); + LOG_DEBUG("gdb service for target %s at port %i", + target->type->name, + gdb_port + target->target_number); - i++; target = target->next; } @@ -1851,8 +2140,8 @@ int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char return ERROR_OK; } } - - WARNING("invalid gdb_detach configuration directive: %s", args[0]); + + LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]); return ERROR_OK; } @@ -1871,8 +2160,8 @@ int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, return ERROR_OK; } } - - WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); + + LOG_WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); return ERROR_OK; } @@ -1891,11 +2180,66 @@ int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cm return ERROR_OK; } } + + LOG_WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); + return ERROR_OK; +} + +int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +{ + if (argc == 1) + { + if (strcmp(args[0], "enable") == 0) + { + gdb_report_data_abort = 1; + return ERROR_OK; + } + else if (strcmp(args[0], "disable") == 0) + { + gdb_report_data_abort = 0; + return ERROR_OK; + } + } + + LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]); + return ERROR_OK; +} + +/* daemon configuration command gdb_port */ +int handle_gdb_breakpoint_override_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +{ + if (argc == 0) + { + + } else if (argc==1) + { + gdb_breakpoint_override = 1; + if (strcmp(args[0], "hard")==0) + { + gdb_breakpoint_override_type=BKPT_HARD; + } else if (strcmp(args[0], "soft")==0) + { + gdb_breakpoint_override_type=BKPT_SOFT; + } else if (strcmp(args[0], "disable") == 0) + { + gdb_breakpoint_override = 0; + } + } else + { + return ERROR_COMMAND_SYNTAX_ERROR; + } + if (gdb_breakpoint_override) + { + LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type==BKPT_HARD)?"hard":"soft"); + } else + { + LOG_USER("breakpoint type is not overriden"); + } - WARNING("invalid gdb_memory_map configuration directive: %s", args[0]); return ERROR_OK; } + int gdb_register_commands(command_context_t *command_context) { register_command(command_context, NULL, "gdb_port", handle_gdb_port_command, @@ -1906,5 +2250,12 @@ int gdb_register_commands(command_context_t *command_context) COMMAND_CONFIG, ""); register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command, COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command, + COMMAND_CONFIG, ""); + register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command, + COMMAND_EXEC, "hard/soft/disabled - force breakpoint type for gdb 'break' commands." + "The raison d'etre for this option is to support GDB GUI's without " + "a hard/soft breakpoint concept where the default OpenOCD behaviour " + "is not sufficient"); return ERROR_OK; }